The word wrongheaded is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 21
Highest Scoring Words With Friends™ Play In The Letters wrongheaded
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Seven Letter Word Alert: (27 words)
adhered, adorned, angered, degrade, derange, dowager, dowered, drowned, endowed, enraged, godhead, grenade, groaned, hagrode, hagweed, hoarded, hogweed, nowhere, oarweed, ragweed, redhead, reendow, rehoned, wagered, whereon, wordage, wronged